Karabuki No. 1, 2 and 4 Mixed Spring
Analysis UnverifiedDrawn from the Karabuki area high on the Tazawako Plateau, where white fumarole steam rises from the mountainside, this water combines three wells. It is light in dissolved minerals and gentle on the skin, yet rich in hydrogen sulfide, so it turns milky in the bath, with drifting mineral flakes and a boiled-egg aroma. The weakly acidic water feels crisp and refreshing, a true mountain spring to enjoy while gazing at the plateau's beech forest.
The bar length shows how abundant each component is compared to thresholds that make it "distinctive" (therapeutic spring standards, beauty spring criteria, etc.).
The source of the distinctive sulfur smell. Dilates blood vessels via skin and inhalation to strongly boost circulation.
A trace component with gentle antibacterial and anti-inflammatory action.
Absorbed through the skin to gently promote peripheral circulation.
Scores are calculated from mineral analysis data based on the Mineral Spring Analysis Guidelines (Ministry of Environment, Japan). They are unrelated to facility atmosphere or service quality.
▸Note
The temperature, pH and component values shown here are based on the hot spring analysis (source). Actual values in the bath may differ depending on heating, dilution, recycling and filtration. Please check current usage status at the facility.
Remove silver jewelry because of the hydrogen sulfide; the weakly acidic water can sting sensitive skin, so a light fresh-water rinse afterward is advisable.
With 22.7 mg/kg of free hydrogen sulfide, this sulfur spring is traditionally associated with immune system stimulation, and its mild overall mineral load makes it an easy introduction to balneotherapy.
Because the water contains hydrogen sulfide, avoid long soaks in poorly ventilated spaces.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Karabuki No. 1, 2 and 4 Mixed Spring
- Spring type
- Simple Sulfur Hot Spring (hydrogen sulfide type)
- Source temperature
- 62.4℃
- pH
- 5.2
Analysis Document
- Analysis date
- 2024-01-12
- Analyst organization
- 株式会社 秋田県分析化学センター
- Registration No.
- 秋田県第2号
Cations
- Lithium ion Li⁺
- < 0.1 mg/kg
- Sodium ion Na⁺
- 44.0 mg/kg
- Potassium ion K⁺
- 1.8 mg/kg
- Ammonium ion NH₄⁺
- 1.6 mg/kg
- Magnesium ion Mg²⁺
- 1.6 mg/kg
- Calcium ion Ca²⁺
- 5.8 mg/kg
- Aluminum ion Al³⁺
- < 0.1 mg/kg
- Manganese ion Mn²⁺
- < 0.1 mg/kg
- Iron(II) ion Fe²⁺
- < 0.1 mg/kg
- Iron(III) ion Fe³⁺
- < 0.1 mg/kg
- Zinc ion Zn²⁺
- < 0.1 mg/kg
- Lead ion Pb²⁺
- < 0.05 mg/kg
- Strontium ion Sr²⁺
- < 0.1 mg/kg
- Barium ion Ba²⁺
- < 0.1 mg/kg
- Copper ion Cu²⁺
- < 0.1 mg/kg
- Cadmium ion Cd²⁺
- < 0.005 mg/kg
- Total cations
- 0.05 mg/kg
Anions
- Fluoride ion F⁻
- 1.5 mg/kg
- Chloride ion Cl⁻
- 48.8 mg/kg
- Hydrogen sulfide ion HS⁻
- 0.30 mg/kg
- Thiosulfate ion S₂O₃²⁻
- 0.10 mg/kg
- Sulfate ion SO₄²⁻
- 20.8 mg/kg
- Bicarbonate ion HCO₃⁻
- 37.4 mg/kg
- Bromide ion Br⁻
- 0.20 mg/kg
- Iodide ion I⁻
- < 0.1 mg/kg
- Hydrogen sulfate HSO₄⁻
- < 0.1 mg/kg
- Nitrate ion NO₃⁻
- 0.40 mg/kg
- Dihydrogen phosphate H₂PO₄⁻
- < 0.1 mg/kg
- Total anions
- 0.11 mg/kg
Undissociated Components
- Sulfuric acid H₂SO₄
- < 0.1 mg/kg
- Arsenious acid HAsO₂
- 0.50 mg/kg
- Metasilicic acid H₂SiO₃
- 72.6 mg/kg
- Metaboric acid HBO₂
- 8.9 mg/kg
- Total undissociated
- 0.08 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 199 mg/kg
- Free hydrogen sulfide H₂S
- 22.7 mg/kg
- Total dissolved gas
- 0.22 mg/kg
Totals
- Total dissolved substances
- 0.25 mg/kg
- Component total
- 0.47 mg/kg
Usage
- Heating
- Yes（乳頭の湯の館内掲示（R5.11.30分析書の別掲『成分に影響を与える項目』、湯活のススメ 2025-09-10撮影）『冬期間は浴槽温度が低いため、加温しています』。）
- Dilution
- No
- Recycle / Filter
- No
- Additives
- No
- Disinfection
- No
Indications & Contraindications
- Bathing indications
- Atopic dermatitis, Plaque psoriasis, Chronic eczema, Epidermal suppuration, Autonomic instability, Insomnia, Depression
- General indications
- High blood pressure (mild), Rheumatoid arthritis, Chronic pain or stiffness in muscles and joints, Muscle stiffness due to motor paralysis, Gastrointestinal dysfunction
- Contraindications
- Acute illness (especially with fever), Active tuberculosis, Malignant tumors, Severe heart disease, Respiratory failure, Renal failure, Bleeding disorders, Severe anemia, Any actively progressing illness, Pregnancy (especially early and late stages), Severe chronic dermatitis (sulphur springs)
Drinking
- Drinkability
- Not drinkable
